Abstract : A feedback control system is constructed by the use of nonlinear neuron-like elements called syncoders in an opposing-actuator control model. A second-order system is simulated on an analog computer and position-controlled with position and force feedback. The syncoder control network is investigated open-loop, and input/output characteristics for the position and force channels are determined. The closed-loop system is examined with the position output of the second-order system being the controlled parameter. The system demonstrates control of position by use of position feedback, of force feedback, or of both feedback signals combined. (Author)